Knitting-machine.



iatented 001 17, 1916.

5SHEET$SHEET 1.

W. W. BUR'SON,

. KNH'TING MACHINE.

APPLICATION HLED MAR. 25-. m2.

Patented Oct. 17, 19%.

SHEETS-SHEET 2.

W. W. BURSON.

KNlTTING MACHINE,

APPLICATION FILED MAR. 25 I912.

Patented Oct. 17, 1916.

mmm.

W. W. BURSON.

KNITTING MACHINE APPUCATION HLED MAR.'25. 1912.

MN. m WW a 1% Q m M an 0., 7

v MW m m J w W. W. BURSON.

KNITTI'NG MACHINE. APPLICATIdN HLED MAR. 25, I912.

' Patented Oct. 17,1916.

' s SHEETS-SHEET 5.

- Ely l4 J WWW M W NELSON 57. BURSON, F EGCKFORD, ILLINOIifi.

mnrrrin'o-reecnnvn.

TEL-301.6531.

Rockford. in the county'of Winnebago end State of iilinois, have invented a new and useful ln'iprovenient in Knitting-Machines, of which the followings iiecilicetion. This invention relates to ii'npirwements in knitting machines and more particularly to that type of knitting inochine disclosed. in

my Patent E l 0.998 059, issued June 21', 1911.

e objects of the invention are to provide Us for causing the projecting and. retreating or knitting co ns to simultaneously assume an inoperative position, to provide automatically operated means for adj listing the knitting cams, to provide means for in suring the positive return of the needle jacks site? the loop has been fornied,fand to pro- 2 ide means for securely holding the jacks in ti: retracted position'when not operating.

J invention furthermore consists in the.

improvements in the arts and devices and in th novel combinations of parts and devices herein shinvn, described or claimed.

In toe drawing forming a part of this specification Figure 1 is eplanvienof n.

knitting machine, showing my in veepplied thereto. Fig; 2 is a elein of the fu'cture shown in Fig. 1. 3 is a plan view, upon an enlarged scale, showing the coin her and the needle bed, parts or the structure being broken away to more clearly lustrate the invention. Fig. 4-. is a plan view of one off cam bars With l 5 is an; elevation oi. a. port of the cum our, showing the 1119:1315 for raising: and lmveriu the czuns. l 6 is a sectional via-mlnken on the line mhclimzism not s plan v 117." one member oi ineniber n sectiona e9 suliistzmtinlly on the line 1(i-1O of 2. 1' ig. 1.1 is e detziil, sectional view of the lever for operating the dog which controls the position of the knitting and taken on the line 11-11 of 2. Fig. e.

1 artist transverse section, taken on the line -13. and including; parts of the.

a the needle bed .oi. the needle bed.

Patented (bet. ii, men.

implication filed March 25, 1912. Serial mess sec.

12 12 of Fig. 2. is nnother trans v verse sectional vicugtalren through the needle bed of the machine and showing the sol: depressed. 14 is itdiagrammatic view, illustrating the operation of one member of the coin one of the ncedle jncks, showing the differ positions iassumed by the'jock as the co n operates the same. All the views shown in Figs. 3 150.14 inciusim are upon an enlarged scale relatively to the scale used in Figs. 1 and 2. I

In. the drawing, 10 denotes the frame of the machine, on which are mounted the re tary -pattern cylinders 11, suitably driven from apulley 12. Adopted to reciprocate on Ways 13 is across head 14, which carries the cambors 15; Mounted on each ciun bar 15 is a bar 16, pivoted-at 17 to the cam her, said bur16 having secured thereto adjacent its free end a. cum carrying block 18, which is slidoble up and down in a recess 19 in the cam bar 15. The bar 16 is normally-pressed upwardly by menus of e SpringQO. and is limited in its upward movementby a stop 21 secured to the cam bar 15. The bar 16 is guided in its up and down movements by means of a. bracket 22 to which is secured a utable. Wheel 23, the latter being provided =1 ;h an even number of ratchet points 241-, and having also number of cum faces 25, the number of the latter being half the number oftherstchet points, each of said cam faces 25 being adapted to contact the wedge sh eped cam member 26 secured to the bar 16.

From the preceding; description, it will be seen that each second movement of the wheel 23 will cause a. depression of the member 16, 'fll'lfl hence. the bar 16 will be alternately 'i'ziiscd and lowered by the rotating oil? the J 3o in eoupteo to be moved in opposition to the spring" 3 by means of e crank arm 31 formed integ' Lly with a rotatahly mounted sleeve 2352, the latter being mounted on a pivot pin preferably screw ed into the plate 34: Also integrally formed with each sleeve 32 is another crank arm 35 on the opposite end to that on Which the has its slotted end 37 kept in an upper position by means of a spring 39 secured to the lever and to a stationary part of the needle bed.

From the preceding description, it will be apparent thatthe bar 16 to which aresecured the knitting cams, is automatically raised and lowered through the instrumentality of the wheel 23, which in turn is automatically controlled through interposed mechanism by the cam rings 38 'located on opposite ends of the pattern cylinders. Pivotally mounted on each block 18 are two -members 40' and 41 forming the projecting and retracting or knitting cams for operating the needle acks-42. Each of these members 40 and 41 is provided at its free or outer end with a pin 43, which is slidable vertically up and down loosely in a hole 44 in an adjusting bar 45, slidable transversely of the cam .bar 15 in a slot 46. Each of these bars 45 is securedto an adjusting bar 47, which is slidable in and guided by the adjusting bar guide 48. The adjusting bar guide 48 is carried by a pivotally mounted adjusting bar guide support 49, the latter having an arm or projection 50 formed integrally therewith normally held down by a spring 160 and in the outer end of which are adjustably mounted adjusting screws 51 which bear on pivotally mounted lever arms 52 that are operated by means of cam rings 53 mounted on one end'of the rotary pattern cylinder 11. From the preceding description, it will be seen that the free ends of f ,the members 40 and 41 of the projecting and retracting cams are automatically moved closer together or separated by the pivotal movement of the adjusting bar guide 48, in which slides the adjusting bar 47, to which are secured the plates 45 slidable transversely of the cam bar 15. By turning'the adjusting screw 51, the amount of adjustment of the members of the cam may be varied as desired, tothereby'vary the length of the loop formed by the knitting needles.

By referrin toFig. 13, it will be seen that each jac '42, to which is secured a needle 54, is provided with a. pair of spaced, upwardly. projecting nibs or cams 55 betweenwhichthe members 40 and 41 of the cam pass to positively project and retract the'jack. Each of these jacks 42, as is well understood, is mounted between division plates 56, and when in a retracted position,

' is adapted to badeprssed 'by means of a jack operating lever 57, controlled from the pattern cylinder in a Well known manner.

In order to provide means for holding each jack 42 in its retracted position when the same is not in 'operation,.I provide a stationary projection 58, which is preferably formed by stamping out a portion from each division plate 56, and which is adapted to engage in a notch 59 on the under side of each jack 42at its inner end.

By referring to Fig. 14, it will be seen that the member 41 of the cam which is traveling in the direction indicated by the arrow a, is provided with a main retracting portion 60 which will retract the jack from the position shown atb to that shown at c, and has an intermediate or inactive portion 61 and a short active face 62 oppositely arranged to the portion 60, which will project the jack slightly to the positional after the same" has been retracted to its rearmost position c.- The member 41 is furthermore provided with a sharp pointed end 63 adapted to enter between the nibs 55. The structure shown in Fig. 14 and just described, relates to the member 41 of the cam, but as will be obvious, the member" 40 of the cam is similarly constructed and the members 40 retracting or knitting cams being always in knitting position. In .such a structure, the knitting point of the cams rub against the operating nib of the jack when the latter is not operating, for instance, when the knitting is done on the opposite side of the machine, and as will be apparent, this causes an unnecessary amount of wear, both on the cam and on the jacks. Another defect in knitting machines as ordinarily made, re sults from the knitting point of the cam striking the jack, which causes the latter to be slightly projected or retracted, which, in turn causes the loop to slip 03 of the hook on the needle, thus making imperfect work. By providing the mechanism which I have described, both the projecting and the retracting portions of the cam are moved simultaneously out of actionwhen not\ required, .thus preventing the unnecessary ing cam is out of operation.

By providing each jack with a recess or projection adapted toengage the projections on the corresponding division plates, the jack and needle are positively prevented from being drawn forward by the stress of.

the yarn when the jack is not in operation.

I have described one form of my inyention, but it will be obvious that many in a machine of the class described, in combination, knitting needles, jacks therett'ona cam bar and acam for operating said jacks, said cam comprising two members pivotally mounted on and carried by said bar and mechanism for simultaneously adjusting, the members of the cam, comprising a pair of plates'slidably mounted on the cam lar, each of said plates being loosely pivoted to the free ends of the cam members. in a machine of the class described, in combination, knitting needles, jacks therefor, a cam bar and a 0: .1 for operating said jacks, said cam comprising two members pivotally mounted on and carried by said bar, and mechanism for simultaneously adjusting the members of the cam, comprising a pair of plates slidably mounted on the cam bar, each of said plates being loosely pivoted to the free ends of the cam members, and an adjusting bar to which said. plates are secured, said bar being longitudinally movable in unison with the cam bar.

' 3. In a machine of the class described, in

combination, knitting needles, jacks thereor cam bar and a cam for operatin said j s, said cam comprising two members pivotally mounted on and carried by said bar and mechanism for simultaneously adjusting the members of the cam, comprising a jiair of plates 'slidably mounted on the cam bar, loosely pivoted to the free ends of the cam membc 1, and an adjusting bar to which said plates are seem-cc, said bar being longitudinally movable in unison with the cam bar, adjusting bar guide in which said adjusting bar reci mmates. said guide being niovabl mounted on the machine and a cam for cox ;rolling the movements of the guide.

-l. in 5 machine oi the class described, in combination, knitting needles, jacks there- 'lor, a cam bar and a cam for operating said jacks, said am comprising two members pivotally mounted on and carried by said bar, and mechanism for simultaneously adj listing the members of the cam, comprising a pair of plates slidably mounted on the cam bar. each of said plates being loosely pivoted to the free ends of the cam menr hers, and an adjusting bar to which said plates are secured, said bar being longitudian adjusting barguide, means for automatically moving one guide, and an adjusting 1erice to change the movements of said uid 5 a machine oi: the class described, in

each of said plates being nally movable in unison with the cam bar,

combination, knitting needles, jacks there for, a cam. bar, a cam carrying bar pivot ally mounted on said cam bar having secured adjacent its free end a knitting cam adapted to operate the jacks and needles, a spring for normally holding the tree end of the carrying bar raised, a stop for limiting the upward movement of the free end of the carrying bar, and means for depressing and retaining depressed the free end of the carrying bar, comprising a ratchet hub rotatably mounted on. the cam bar, said ratchet hub being providedwith a plurality of cam faces adapted to engage the carr ing bar, pivoted dogs located at the ends of the needle bed for operating said ratchet hub and automatically controlled means for moving the dogs.

6. In a. machine of the class described, in combination, knitting needles, jacks therefor, and a cam for operating said jacks, said cam comprising. two members movably mounted relatively to each other, the cam being provided with one portion adapted to project the jacks and needles to their extreme forward position, another portion adapted to retract thejacks and needles to their extreme rear position and a third portion adapted to project the jacks and needles a slight distance forwardly immediately after the latter have been retracted.

7. In a machine of the class described, in combination, knitting needles, jacks and a knittim cam for operating said jacks, said cam comprising two members .movably mounted relatively to each other, and mov .ableoto an inoperativeposition, each ol? said .jacks being provided with a pair of spaced,

operating nibs between which the cam is adapted to pass.

, 8. In a machine of the class described, incombination, knitting needles, acks there for, and a knitting cam for operating said jacks, said 'cam comprising two members movably mounted. relativelyto each other and having portions adapted to project the j aclrs to theirinnermost or forward ,position to retract the j acks and needles to their rear position, and to project the jacks slightly forward after they have been retracted, and each of said jacks being provided. with a pair" of spaced operating nibs between which the cam is adapted to pass.

9. In a machine ofthe class described, in combination, knitting needles, jacks therefor and a knitting cam for operating said jacks, said cam comprising two members movably mounted relatively to each other and adapted to be moved to an inoperative position relatively to the jacks, said cam having portions thereon adapted to project the jacks to their forward posi rx. to their rear position and to a position, lightly forward after they have been retracted, each of said jacks being provi led with a pair 'of spaced operating nibs between which the cam is adapted to pass.

10. In amachine of the class described, in combination, knitting needles, jacks, a cam bar and a knitting cam carried by said cam bar, each of said jacks being provided With a pair of spaced operating nibs adapted to be engaged by the cam, said cam having portions thereof adapted to project and retract the cams to their forward and rear positions, and having also a third portion adapted to slightly project the jacks after the latter. have been retracted.

11, In a machine of the class described, in combination, knitting needles, jacks, a cam bar and a knitting cam carried by said cam bar, each of said jacks being provided with a pair, of spaced operating nibs adapted to be engaged by the cam, said cam having por tions thereof adapted to project and retract the cams to their forward and rear positions and having also a third portion adapted to slightly project the jacks after the latter have been retracted, and means for movbeing provided with a pair of spaced op-- erating nibs between which the cam is adapted to pass.

13. In a machine or the class described, I

in combination, knitting needles, jacks therefor and a knittin cam said cam bein movable from an operative to an inoperative position and vice versa, and having portions thereof adapted to project and retract the jacks and also a third portion adapted to slightly projectthe jacks after the latter have been retracted.

, WrLsoN W. season. Witnesses A. W. ROBERTSON,

F. J. OBRIEN' 

